Question: A manager wishes to build a 3sigma range chart for a process. The sample size is five, the mean of sample means is 28.5, and
A manager wishes to build a
3sigma
range chart for a process. The sample size is five, the mean of sample means is 28.5, and the average range is 3.9. From Table S6.1, the appropriate value of
D3
is 0, and
D4
is 2.115. What are the UCL and LCL, respectively, for this range chart?
A.
40.2 and 16.8
B.
32.4 and 24.6
C.
8.25 and 0
D.
30.75 and 26.25
E.
11.2 and 0
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